With the changes to camo the camo is a rather UP ability so I would suggest giving some RA bonuses as well and lowering cost.
The cost is 30 so it is already cheap. The Grenadier variant in my mod gains one G43 to help with damage. Maybe to adjust the camo settings to allow them more movement for the camo? Remember they do have a first strike bonus of x1.5 accuracy bonus for 5 seconds which really does help. I was also thinking of allowing Pioneers and AT guns to upgrade this as well. Maybe mortars too? So if they were going to get flanked they could just hide until they pass.
I am assuming you mean carbine and not the garand?
The G43/LMG (in your mod) is wierd on the PG so I would suggest that the ability for PG now give 4+1 g43 (around Ranger m1 Garrard level) and allows an extra member (no schrecks).
While your idea is interesting, I am a bit hesitant on changing Pgrens. In the live game, Riflemen with two BARs is relatively equal to a Pgren squad, excluding vet. Note I am not saying no because they would still be weaker than Rangers with their target size. Would you like to see this on Stormtroopers in the elite troops doctrine (exclusive to the other upgrades)?